CN101988780A - Anti-condensation refrigerator and anti-condensation control method - Google Patents
Anti-condensation refrigerator and anti-condensation control method Download PDFInfo
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- CN101988780A CN101988780A CN2009100178198A CN200910017819A CN101988780A CN 101988780 A CN101988780 A CN 101988780A CN 2009100178198 A CN2009100178198 A CN 2009100178198A CN 200910017819 A CN200910017819 A CN 200910017819A CN 101988780 A CN101988780 A CN 101988780A
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Abstract
The invention discloses an anti-condensation refrigerator. The anti-condensation refrigerator comprises a heating device which is arranged on a sealing beam and/or a separation beam to heat the sealing beam and/or the separation beam, a temperature sensor which is arranged on the sealing beam and/or the separation beam to detect the temperature of the sealing beam and/or the separation beam, and a control system which comprises a controller and a contactless switch device, wherein the controller controls the start-stop of the heating device through the contactless switch device under the monitoring of the temperature sensor to ensure that the temperature of the sealing beam and/or the separation beam is always higher than first set temperature. The heating device is controlled by the contactless switch device, so control rate is higher, temperature fluctuation is small, and energy consumption is reduced. The invention also discloses an anti-condensation control method.
Description
Technical field
The present invention relates to the housed device field, relate in particular to a kind of anti-condensation refrigerator and anti-condensation control method.
Background technology
Traditional sealed beam and the heater strip of separating in the beam are by electromechanical relay control, and its anti-condensation working method mainly is time control, and for example heater strip is opened and stopped in 50 minutes 10 minutes, relatively immobilization.Under the situation of varying environment temperature and different humidity, Jia Re temperature is not enough sometimes, and then causes described sealed beam or separate beam being lower than dew-point temperature and causing the condensation phenomenon.
Therefore, for realizing anti-condensation purpose, only according to least favorable condition setting heater strip start-stop ratio.That is, environment temperature and humidity all are set to condition with higher, the heating-up temperature of so described sealed beam and separation beam will be higher.When with the environment temperature of reality and psychrometric difference when big, can improve energy consumption greatly.
On the other hand, because the lower restriction of the switching frequency of relay itself, the start-stop frequency of the heater strip that it is controlled is also lower.Heating wire works when beam body temperature degree is lower than dew-point temperature, because relay mechanical contact low-response, beam body temperature degree had been higher than dew-point temperature before heater strip quit work often, therefore must cause the waste of energy consumption.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of anti-condensation control method of low energy consumption.
In order to solve the problems of the technologies described above, the present invention proposes the anti-condensation control method of a kind of refrigerator, may further comprise the steps:
Whether the temperature that the controller of refrigerator is monitored sealed beam and/or separation beam in real time by temperature sensor arrives first design temperature, if then controller is arranged at the heater element work of described sealed beam and/or separation beam by the control of noncontacting switch device.
Wherein, whether the temperature that described controller is also monitored sealed beam in real time by temperature sensor and/or separated beam arrives second design temperature, if then controller quits work by the heater element that the control of noncontacting switch device is arranged at described sealed beam and/or separation beam.
Wherein, environment temperature and the humidity by real-time monitoring obtains described first design temperature.
Accordingly, also propose a kind of anti-condensation refrigerator, comprising in order to solve the problems of the technologies described above the present invention:
Be provided with some chambers refrigerated/froze article to hold casing;
Door body in order to described some the chambers of selectable sealing;
Be arranged on the described door body with the sealed beam that seals chamber between correspondence and/or be arranged between the chamber separation beam with the compartment chamber;
Be arranged at the refrigeration system being freezed in described some chambers in the described casing;
Control the control system that described refrigeration system is freezed to described some chambers;
Wherein, also comprise:
Be arranged at described sealed beam and/or separate the heater element of beam so that it is heated;
Be arranged at described sealed beam and/or separate beam to detect the temperature sensor of its temperature;
Described control system comprises controller and noncontacting switch device;
Described controller under the monitoring of described temperature sensor by described noncontacting switch device control described heater element start-stop so that described sealed beam and/or the temperature of separating beam be in all the time more than first design temperature.
Wherein, also comprise:
Be arranged at described casing and be communicated with humidity sensor with space outerpace with testing environment humidity;
Be arranged at described casing and be communicated with ring temperature sensor with space outerpace with the testing environment temperature;
Described controller is determined described first design temperature according to the data in real time of described humidity sensor and the detection of described ring temperature sensor.
In addition, described door body is by being articulated in described casing by the ccontaining hinge of hinge box; And described humidity sensor is arranged in the described hinge box.
Wherein, the corresponding described humidity sensor of described hinge box position is provided with hole/slit.
Preferably, the sensitive surface of described humidity sensor is back to described hole/slit.
Optionally, described noncontacting switch device is controllable silicon, triode or speed-sensitive switch chip.
In addition,
When described temperature sensor detected temperatures reached described first temperature, described controller was controlled described heater element by described noncontacting switch device and is started working;
When described temperature sensor detected temperatures reached described second temperature, described controller was controlled described heater element by described noncontacting switch device and is quit work.
The present invention is owing to control described heater element by the noncontacting switch device, thereby can make that control rate is faster, thereby the fluctuation of temperature is less, has reduced energy consumption.
On the other hand, because adopting the method for temperature that detects sealed beam and separate beam comes its temperature is controlled, determine first design temperature in real time according to current environment temperature and humidity in addition, thereby make that the control of heating operation is more accurate, reduced energy consumption, avoided in the prior art high energy consumption that the method for fixing start/stop time ratio is brought being set according to worst situation.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the anti-condensation refrigerator of the present invention;
Fig. 2 is based on anti-condensation workflow diagram embodiment illustrated in fig. 1;
Fig. 3 is the structural representation of an embodiment of middle control embodiment illustrated in fig. 1 and refrigerating part;
Fig. 4 is a temperature controlled curve contrast schematic diagram in prior art and the scheme embodiment illustrated in fig. 1.
The specific embodiment
At first, briefly set forth principle of the present invention.Among the present invention, be provided with the non-contact type switching device and come the start-stop of heater element is controlled, make control rate improve, and then reduced temperature fluctuation.And by temperature sensor being set at beam body (for the general designation of described sealed beam) with the body of separating beam, temperature that obtains and first design temperature that obtains in real time by environment temperature and humidity are compared the start-stop of control heater spare, science is with accurate more in feasible control, and power consumption reduces.
The present invention will be described in detail below in conjunction with accompanying drawing.
With reference to figure 1, illustrate the structural representation of an embodiment of the anti-condensation refrigerator of the present invention.As shown in the figure, comprise casing 10; This casing 10 has comprised the refrigerating chamber 11 on top again, and the refrigerating chamber 12 and the refrigerating chamber 13 of bottom.
Described refrigerating chamber 11 seals by door body 111 and 112, and described refrigerating chamber 12 and refrigerating chamber 13 are the drawer type door body, in the present embodiment it is removed clearer displaying the present invention (because in some cases, the drawer type door of described refrigerating chamber 12 and refrigerating chamber 13 cognition is covered following separation beam 123).
Described door body 111 and door body 112 are articulated in described casing 10 by hinge respectively, and its hinge separately then holds by hinge box 14 and 15 respectively.
Because door body 111 and door body 112 seal described refrigerating chamber 11 in the mode of clamshell doors, thereby inevitably the joint after closure can produce the leakage of cold air, thereby are provided with sealed beam.As figure, sealed beam 113 is arranged on the described door body 111.Be provided with heater strip 1131 in the inside of described sealed beam 113, and towards a side of space outerpace temperature sensor 1132 be set when described sealed beam 113 work shape bodies, it is used for the temperature of the described sealed beam 113 of perception.
Be provided with environment temperature sensor 142 and humidity sensor 141 in the described hinge box 14.Wherein, corresponding described environment temperature sensor 142 of the upper casing of described hinge box 14 and humidity sensor 141 places are provided with hole/slit (figure does not show), so that described environment temperature sensor 142 effectively contacts with external environment condition with humidity sensor 141, and then obtain reliable temperature and humidity data.
Described hole/slit can be the special some through holes that are provided with, and also can be some grids.Or the hole/slit that produces for the needs that adapt to other functions or structure, described herein environment temperature sensor 142 and humidity sensor 141 are shared this hole/slit.
In a preferred embodiment of the present invention, the perception of described humidity sensor 141 faces down, also be its back side up.The purpose of She Zhiing is like this, can effectively protect the perception face of described humidity sensor 141 injury-free (might have foreign matter to probe into from described hole/slit and damage the perception face of described humidity sensor 141).Be appreciated that similar scheme also can be applicable to environment temperature sensor 142.
Separate by separating beam 123 between described refrigerating chamber 12 and the refrigerating chamber 13.Described separation beam 123 is owing to only be used for separating described refrigerating chamber 12 and refrigerating chamber 13, the demand that also goes out to save the space, thereby its setting is shorter, its rear end only exists only in the front end of casing 10 not against the rear portion of described casing 10.So, its temperature owing to himself can slowly reduce, and then if no corresponding measure can produce the condensation phenomenon.
Wherein, described separation beam 123 is provided with heater strip 1231 and temperature sensor 1232.
The top of described casing 10 is provided with control panel 16, and this control panel 16 is provided with controller (figure does not show, hereinafter will address) and solid-state relay 161.
Described temperature sensor 1132, temperature sensor 1232, humidity sensor 141, environment temperature sensor 142 all with described control panel 16 on controller be connected with the data that its detection is obtained and feed back to described controller.
And described heater strip 1131 all is connected with described solid-state relay 161 with heater strip 1231, to set up alternating current path under the control of described solid-state relay 161.Described solid-state relay 161 is connected with described controller again, to be controlled by this controller.
With reference to figure 3, illustrate the structural representation of an embodiment of middle control embodiment illustrated in fig. 1 and refrigerating part.As shown in the figure, comprise controller 31, refrigeration system 32, solid-state relay 161, heater strip 33, environment temperature sensor 142, beam body temperature degree sensor 34, humidity sensor 141.
Wherein, described beam body temperature degree sensor 34 is temperature sensor 1132 on the middle sealed beam 113 embodiment illustrated in fig. 1 and the general designation of separating the temperature sensor 1232 on the beam 123.
Described environment temperature sensor 142 is used for real-time testing environment temperature, and the data that detection obtains are sent to described controller 31.
Described beam body temperature degree sensor 34 is used for detecting described sealed beam 113 in real time and separates the temperature of beam 123, and sends it to described controller 31.
Described humidity sensor 141 is used for real-time testing environment humidity, and the data that detection obtains are sent to described controller 31.
Described heater strip 33 is general designations of middle heater strip 1231 embodiment illustrated in fig. 1 and heater strip 1131.It is used for respectively described separation beam 123 and sealed beam 113 are heated, thereby prevents condensation.
Described solid-state relay 161 has comprised three ports, comprises control end A, first utmost point B and second utmost point C.Described control end A is connected with described controller 31 receiving control signal, described first utmost point B and second utmost point C then and 33 of described heater strips form ac circuit.
With reference to figure 2, illustrate based on anti-condensation workflow diagram embodiment illustrated in fig. 1.As shown in the figure, may further comprise the steps:
Step S21 gathers environment temperature and humidity.
That is, gather environment temperature and humidity respectively by environment temperature sensor 142 and humidity sensor 141 in this step, and the data that collect are sent to described controller 31;
Step S22 determines first design temperature and second design temperature.
Wherein, environment temperature and humidity that described first design temperature obtains by previous step, and obtain according to the corresponding relation of environment temperature, humidity and first design temperature.
In the present embodiment, described first design temperature is dew-point temperature, and an embodiment of described corresponding relation can be with reference to following table:
Environment temperature has been shown respectively at 10,15,20,25,32,35,38 degrees centigrade in the last table, corresponding humidity be respectively 40%, 60%, 80%, 90% o'clock dew-point temperature (degree centigrade).
Because environment temperature, humidity can also more be segmented, and scope also can be wider, therefore in one embodiment can not be by limit, top form only is one and gives an example.More detailed corresponding relation for environment temperature, humidity and dew-point temperature, can be with reference to the corresponding relation between known wet-bulb temperature in the corresponding field (also being dew-point temperature), dry-bulb temperature (being environment temperature), the relative humidity (also being humidity), above the form illustrated embodiment only be part intercepting to above-mentioned corresponding relation.
Described second design temperature is a default temperature on dew-point temperature, and it is the described heater strip 33 required temperature that are heated to.
General, described second design temperature is higher than 0.5 degree centigrade to 1 degree centigrade of described dew-point temperature.
Step S23, the temperature of acquisition beam body.
That is, detect the temperature of described beam body, and this temperature is sent to described controller 31 by beam body temperature degree sensor 34.The temperature of described beam body has comprised the temperature of sealed beam 113 and has separated the temperature of beam 123.
Step S24 judges whether the beam body temperature degree that previous step obtains arrives first design temperature, if, execution in step S25 then, otherwise execution in step S21.
The purpose of this step is judge whether the temperature of described beam body arrives dew-point temperature (also being first design temperature), if then show dewfall soon; Otherwise thinking not can dewfall, and then is circulated to step S21 to determine new dew-point temperature in real time and to carry out follow-up judgement.
Step S25 starts heater strip.
That is, when determining to be about to dewfall, just open heater strip the beam body is heated to prevent condensation by step S24.
Step S26 judges whether beam body temperature degree has reached second design temperature, if, execution in step S21 then, otherwise execution in step S25.
Whether the temperature that the purpose of this step is to judge the beam body to second design temperature, if, show that then the temperature that is heated of heater strip has satisfied demand, can stop heating; Otherwise, continue execution in step S25 and heat, until arriving described second design temperature.
When the temperature of beam body had arrived second design temperature, the execution in step that then circulates S21 determined new dew-point temperature according to real-time environment temperature and humidity, carries out follow-up control procedure.
In the present embodiment, owing to real-time obtains dew-point temperature according to environment temperature and humidity, thereby the dew-point temperature that obtains is the most accurately; Carry out the start-stop control of heater strip based on this dew-point temperature, avoided according to worst situation and regular time than carrying out energy consumption too much in the mode of start-stop.For instance:
All obtain dew-point temperature according to higher levels of humidity 80% in the prior art, and actual humidity is 40%, when environment temperature was 25 degrees centigrade, its dew-point temperature that obtains was 22.4 degree so, and actual dew-point temperature only is 16.3 degree; And in control procedure, once arriving the words that dew-point temperature heats, beam body temperature degree can be always more than 22.4 degree so, situation with respect to actual dew-point temperature 16.3 degree, then only need reach 16.3 and heat when spending, so just produce and temperature is promoted to 22.4 from 16.3 degree spends the energy consumption that is produced.
In another embodiment, described first design temperature is not a dew-point temperature, but is higher than a value of dew-point temperature.And it is a lot of that general described first design temperature can not be higher than described dew-point temperature, for example between 0.1 degree centigrade to 1 degree centigrade.
The purpose that first design temperature so is set is that when the temperature that detects described beam body arrived first design temperature, described solid-state relay was just controlled described heater strip and heated.But, no matter which kind of noncontacting switch device or electromechanical switch device, it all has the time of a response, and for the noncontacting switch device, this time is very small; But for the electromechanical switch device time longer relatively, in this time, the temperature of described beam body might drop to below the dew-point temperature, and then can produce small condensation.
So, for fear of above-mentioned small condensation, first design temperature has been improved some on described dew-point temperature at this, so just can offset the response time of switching device, thoroughly avoided the condensation phenomenon, make anti-condensation effect further improve.
As seen, described first design temperature obtains having determined dew-point temperature to add a numerical value later on, the acquisition of described dew-point temperature can be with reference to relevant elaboration above, the described numerical value that adds then can be according to the practical experience value, between for example mentioned above 0.1 degree centigrade to 1 degree centigrade.
In addition, described noncontacting switch device is not limited to above-mentioned solid-state relay, and the on-off circuit that can also adopt triode to make up perhaps directly adopts the speed-sensitive switch chip.
With reference to figure 4, illustrate temperature controlled curve contrast schematic diagram in prior art and the scheme embodiment illustrated in fig. 1.As shown in the figure:
As can be seen, in the prior art by electromechanical relay fixedly heater strip start-stop time than control.Adopt the defective of electromechanical relay: time period t part among the figure, end from t1 to t2, be lower than dew-point temperature (being low to moderate b degree centigrade) in the temperature of beam body described in this part, still can condensation.It is that delay voltage owing to electromechanical relay causes, because the response of electromechanical relay is slower, thereby when when t1 arrives dew-point temperature constantly, control described electromechanical relay mechanical contact closure, it just finishes response in the time period t of t1 to t2, reality just begins heating constantly at t2.
Adopt the defective of set time ratio:
Be example with t time place part heat time heating time among the figure, is the time of t time and the follow-up curve ascent stage that follows closely, and the time that stops to heat is the time of curve decline stage of following closely before the t time.Because under different environment temperatures and different humidity, the temperature of heating may make beam body temperature degree be lower than dew-point temperature inadequately, and then produces condensation; For fear of this problem, have only the start/stop time ratio that heater strip is set according to worst condition (for example maximal humidity), make heat time heating time much larger than dwell time (for example open and stopped in 50 minutes 10 minutes).So, just make the temperature that heats up to a degree centigrade, and minimum temperature can cause the fluctuation of temperature violent at b degree centigrade, anti-condensation effect is bad.And, in some cases, does not need to heat and just can play anti-condensation effect default heat time heating time, but still must carry out the regular time heating, thereby energy consumption strengthens.
And in the present embodiment, by detecting the temperature of beam body, the quick break-make control of contactless relay in addition is controlled at the temperature of beam body between the dew-point temperature and second design temperature, has effectively realized anti-condensation control.
Illustrate the low energy consumption effect of the solution of the present invention below by real data:
Prior art adopts in the electromechanical relay control scheme:
Adopt the 15W heater strip, open 30min and stop 10min and can remove condensation, move 24 hours power consumption and be: 15 (W) *, 18 (h)=0.27KWh
And adopt the noncontacting switch device to control:
The same 15W heater strip that uses then only need be opened 20s and stop 40s and can reach effect same, its 24 hours power consumption: 15 (W) * 8=0.12KWh
Energy-conservation 0.27-0.12=0.15KWh
As seen, energy-saving effect of the present invention is obvious, and energy consumption is low.
It should be noted that; existing electromechanical relay is considered life problems; can not refine to the second is that unit controls; thereby existing electromechanical relay generally is the unit start-stop with the dozens of minutes; available machine time has been grown and must cause the energy consumption waste; having grown same downtime then can condensation and must increase time of heating, that is to say the increase energy consumption.
Above disclosed is preferred embodiment of the present invention only, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (10)
1. anti-condensation refrigerator comprises:
Be provided with some chambers refrigerated/froze article to hold casing;
Door body in order to described some the chambers of selectable sealing;
Be arranged on the described door body with the sealed beam that seals chamber between correspondence and/or be arranged between the chamber separation beam with the compartment chamber;
Be arranged at the refrigeration system being freezed in described some chambers in the described casing;
Control the control system that described refrigeration system is freezed to described some chambers;
It is characterized in that, also comprise:
Be arranged at described sealed beam and/or separate the heater element of beam so that it is heated;
Be arranged at described sealed beam and/or separate beam to detect the temperature sensor of its temperature;
Described control system comprises controller and noncontacting switch device;
Described controller under the monitoring of described temperature sensor by described noncontacting switch device control described heater element start-stop so that described sealed beam and/or the temperature of separating beam be in all the time more than first design temperature.
2. refrigerator according to claim 1 is characterized in that, also comprises:
Be arranged at described casing and be communicated with humidity sensor with space outerpace with testing environment humidity;
Be arranged at described casing and be communicated with ring temperature sensor with space outerpace with the testing environment temperature;
Described controller is determined described first design temperature according to the data in real time of described humidity sensor and the detection of described ring temperature sensor.
3. refrigerator according to claim 2 is characterized in that, described door body is by being articulated in described casing by the ccontaining hinge of hinge box; And described humidity sensor is arranged in the described hinge box.
4. refrigerator according to claim 3 is characterized in that, the corresponding described humidity sensor of described hinge box position is provided with hole/slit.
5. refrigerator according to claim 4 is characterized in that the sensitive surface of described humidity sensor is back to described hole/slit.
6. according to each described refrigerator in the claim 1 to 5, it is characterized in that described first design temperature is higher than described dew-point temperature.
7. according to each described refrigerator in the claim 1 to 5, it is characterized in that,
When described temperature sensor detected temperatures reached described first temperature, described controller was controlled described heater element by described noncontacting switch device and is started working;
When described temperature sensor detected temperatures reached described second temperature, described controller was controlled described heater element by described noncontacting switch device and is quit work.
8. anti-condensation control method of refrigerator may further comprise the steps:
Whether the temperature that the controller of refrigerator is monitored sealed beam and/or separation beam in real time by temperature sensor arrives first design temperature, if then controller is arranged at the heater element work of described sealed beam and/or separation beam by the control of noncontacting switch device.
9. method according to claim 8, it is characterized in that, whether the temperature that described controller is also monitored sealed beam in real time by temperature sensor and/or separated beam arrives second design temperature, if then controller quits work by the heater element that the control of noncontacting switch device is arranged at described sealed beam and/or separation beam.
10. according to Claim 8 or 9 described methods, it is characterized in that environment temperature and humidity by real-time monitoring obtain described first design temperature.
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